*{
    box-sizing: border-box;
}
.app_container--main{
    width: 100%;
    height: calc(90vh + 20px);
    display: flex;
    align-items: center;
    flex-direction: row;
    padding: 0;
    margin: 0;
}
.app_container--middle{
    width: 50%;
    height: calc(90vh + 20px);
    display: flex;
    align-items: center;
    flex-direction: column;
    gap: 10px;
    padding: 0;
    margin: 0;
    border-radius: 5px;
}
.app_container--left{
    width: 25%;
    height: calc(90vh + 20px);
    background-image: url("../img/背景图左.jpg"); /* 替换为你的图片路径 */
    background-size: cover; /* 背景图覆盖整个容器 */
    background-position: center; /* 背景图居中 */
    background-repeat: no-repeat; /* 背景图不重复 */
}
.app_container--right{
    width: 25%;
    height: calc(90vh + 20px);
    background-image: url("../img/背景图右.jpg"); /* 替换为你的图片路径 */
    background-size: cover; /* 背景图覆盖整个容器 */
    background-position: center; /* 背景图居中 */
    background-repeat: no-repeat; /* 背景图不重复 */
}
.calendar {

    width: 40%;
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.calendar .day {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #ddd;
    border-radius: 2px;
    cursor: pointer;
}

.calendar .day:hover {
    background-color: #f0f0f0;
}

.calendar .day.checked {
    background-color: #4CAF50;
    color: white;
}

.input_section {
    width: 90%;
    height: 30%;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

}

.input_section textarea {
    width: 100%;
    height: 100px;
    padding: 10px;
    font-size: 16px;
    border-radius: 5px;
    resize: none;
}

.input_section button {
    margin-top: 10px;
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.input_section button:hover {
    background-color: #45a049;
}

.message_wall {
    margin-top: 20px;
    height: 60%;
    width: 90%;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-y: auto;
}
.message_wall::-webkit-scrollbar {
    display: none;
}
.message_wall .item {
    width: 100%;
    height: 100px;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 5px;
    border: 1px solid #ddd;
    display: flex;
    flex-direction: row;
}
.item-avatar{
    width: 50px;
    height: 50px;
    border-radius: 5px;
}
.item-right{
    margin-left: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.content{
    height: 90%;
    width: 100%;
}
.item-footer {
    height: 10%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: #999;
}